Anyone who betrays me, I never forget

You can't forget it, but I wouldn't say (it was) revenge. I'd say motivation. That was something that hurts really bad deep inside, and it's something that we've felt from the time we lost.

It's not grudges that I hold, it's just bad memories I can't forget

You love, you hate, you forgive, but you never forget.

To forget a wrong is the best revenge

Never shall I forget the days I spent with you. Continue to be my friend, as you will always find me yours.